Concrete pile with enlarged base



July 9, 1935. E. D. WATT 2,007,668

CONCRETE PILE WITH ENLARGED BASE Filed June l2, 1933 2 Sheets-Sheet l N Fm.V

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@bu/@WLM ATTORNEYS July 9, 1935. E' D WATT 2,007,668

CONCRETE PILE WITH ENLARGED BASE Filed June 12, 1933 2 sheets-sheet 2 $11; gf.- zo zo sa lj; 40

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a 38 ATToRNEYg` f 2% BY Patented July 9, 1935 PATENT oFFicE i CONCRETE rILE Wrrn ENLARGED EASE v Eiihu n. Watt, Plainfield, N. J., ssignor to Raymond'Concrete Pile Company, New York, N. Y., v

a corporation of New Jersey Y A i Implication June'ia 1933, serial No. 675,319

" flslems- 01- 61-57 In the `formation of concrete ,piles rit is some` times desirabletoenlarge `the'base yof the pile rin order 'toprovide increased load bearing area. Attempts have been made to accomplish the re- 1215 suit bysinkingafcasing into the ground for the ipurposegof, shaping the pile, proper, and then `eXt-ruding plastic `concrete from ythe lower ,end ofthe casing/in the endeavor to-form abuIbOus .concrete ,mass below the casing,-With-the idea that this masswfould become an .integralpa-rt of the finished pile structure, thus creating a pile with an enlarged lowerend. Such attempts have not been very successful in practice;` because of .the absenceof meansfior-controlling theeow of `the .extruded concrete, ,whchwould, of cou-rse, :follovvzthe line of least resistancefand Was therefore justas `likely to ow sidewise or upwardly vas to concentrate in a masspf gthe ldesiredshape `and location. many-event `therevfas 11o-Way of knowing,l Whats-'shape the Y- extruded material `would assume, -nor `Where, it might be with irela-V `violan fthewdr @f"-1:henpi1e .f

An Iobiect ,ofthepresentinvention is1 to solve the problem byv disclosing Ways and ,niieans `for for-ming .enlarged-pile basesof controlled `shape and location.` Y The .invention contemplates .placing-:in the .ground facasing Within Whichfthebody lof. the pile is tobe formed,` the casinghaving in its `lovver end an `assemblgvof umembers' forming .a sectional Adrive .point-fthe pointbeing encased in `a. cupls'hapeldl sheet [metal boot having `.overlapping leaves.v Then vthe y'casing :is ,partially withdrawn, the members-comprising the .-,drve point are spread apart in `spoke-like.formation to cause the boot to .form a cavity .of` predeterminedshaperand dimensions vbelov'v the casing, andthen rplastic lconcrete' is .supplied lthrough thecasing to fill .the ,`cavity, .thus forming (Withthe sections Tof' .the drive point) .an enlarged base forthe pile. Ihe casing .and `sectional ,point may be driven `:simul- -.taneo11s`ly, gor thev casing maybe driven rst and the drive pointy lowered later, .after the contents ,ofthecasinghave -been're'moved i Further and other objects and .advantagesv -Will bey apparent r.from `the .specication and;A claims, fand from rthe .accompanying vdravvingswhich @illustrate `what isnow, considered Vthe preferred embodiment `ofthe invention. Fig. lfshows the .casing Withthesectionaldrive Vpoint vfi'n Athe bottom of the Vcasngand -the a driv- .ingiol-lovverresting .on the point. n Figs. .2 and Sshow thesheet metal-bootbefore *and after it is shaped to encase the drivepoint. Eig-41s a `View on .lined-4 of .Eig..1., showing point .22; and `the follower is lowered .into .the .casing on top 'of .concrete `3.8, .the 4guide member the casing, the-sections .ofthe drive point its boot with itsfoverlappi'ng leaves.

p Fig. shows the next step of the :operation `after Fig. 1, the casng'having been raisedl to the )top of thejdrive point, plasticconcretehaving 5 been poured into the casingon top of the drive point, `and the follower having been provided on its lower endfwitha conical spreader. Y

Figs. -64 and "7 vshow the steps following Fig. i5 toicomplete the enlarged ibase and the bod-y of `L0 kthe-pile. L

Fig. 8 is al cross-section on :line 8-,B-of Fig. 7.

Fig. 9 shows a modied embodiment of the irl- .vention l v .and

\ Referring to Fig. 1,V 20 isga casing WhChfhaS 715 `been sunk im@ the ground fbyfany @convenient means,A andf22 are sectionsf the drivefipoint fin the bottom .of the casing.. ,Sections or imembers 22, as shown, are of concrete, and there arefollr of them foliigs, 1 and .49. .cased in .a boot formed from a disc of sheet Vmetal :2t (Figs. 2 and 3) peut radially` asx-at `25 :to :form .leavesjwhich (Figs. ,3 and 24) 'when lthey encase members-L ,overlap each other as shown. A follower 216 rests 4G11-t0n Ofmembers. 22 and has 1.2.5 a conical guide member 28iiente1i1g fa conical lcavity formed in thefsections of thedrive point inorderto hold `the drivepoin-t assemblyinproper alignment. `.The upperfend of guidemember 2.8 is .seated `in'socletfli,in the lower end .of :follower .30 .256 and Visheld therein by'key ,32 passing :throughkey slot 34. If the casing and boot are driven ,si-multaneons1y.a rope yseal 315 may Joe use d to prevent entry of `Water and'dirt between b oot :and casing.

, v i 35 Withtthe drive :poi-nt held `in position =by follower i 26 and guide member .23, .thewcasing `is then raised unt-il its .lower -endis` vat thetop Iof .the `drive point;

nfollower .2631s removed; .agb'atch of plastic .con-

crete 38 .is poured-into casingzil ontop of drive .28 ,formerly .on the .bottom of rthe vfollower being now .replaced .by Vaslcnreader Ycone 40. The ,parts are .then `asshovvn in Fig.,5. l

The follower is 4then drivenjwith the result shown in Fig. 6, in Whichspreader .Ail has p lislried .outwardly-thesections of the dr've'point, thusflen- `.cated tio the Qperatorby the,location of 55 The sections are een- #20 base 'of vlarger spreader 40. Under certain conditions the spreading may continue until sections 22 have reached the dotted positions of Fig. 7.

During this base-forming operation, ground water is excluded by the overlapping leaves of boot 24.

Following the operation of Fig. 6, follower 26 is withdrawn and the body of the pile is poured, casing 20 being withdrawn as the pouring proceeds or afterwards, if and as desired.

The modification shown in Fig. 9 differs from the arrangement described above, in replacing the metallic spreader point 40 by a concrete spreader point 42 which becomes a part of the permanent pile structure. This concrete point has reinforcing bars projecting downwardly into the concrete of the base and upwardly into the concrete of the column, and has attached to it an upwardly extending shell 44 which also becomes a part of the finished structure. Shell 44 is usually corrugated and screwed onto spreader 42.

It is to be understood that'the invention is not limited to the specific embodiment herein illustrated and described, but may be used in other ways without departure from its spirit as defined by the following claims;

1. A base forv a concrete pile comprising in combination, a plurality of radially projecting members, and a filling of concrete between said members to form a circumferentially continuous diameter than the column of the pile. f Y

2. A base for a concrete pile comprising in combination a plurality of radially projecting preformed concrete members, and a filling of concrete between said members to form a circumferentially continuous base of larger diameter than the column of the pile.

3.- A concrete pile comprising in combination a column portion and a circumferentially continuous base portion; said base portion comprising a plurality `of radially projecting preformed members and a filling of concrete between said members, said filling being integral with said column and with said members.

4. A base for a concrete pile comprising in combination a plurality of radially projecting members, a boot enclosing said members, and a filling of concrete within said boot to form with vsaid members a base of larger diameter than the column of the pile.

5. A concrete pile comprising in combination a column and a base; said base comprising a plurality of radially projecting preformed members, a boot enclosing said members, and a lling of concrete within said boot, said filling being integral with said column and said members to form a base of larger diameter than said column.

6. A concrete pile comprising in combination, a column and a base; said base comprising a plurality of spaced preformed concrete members and a filling of concrete between said members, said filling serving to form with said members a circumferentially continuous base of greater diameterrthan said column, and also serving to bind said base to saidcolumn.

7. In the method of forming an enlarged base for a concrete pile, the steps of radially displacing a plurality of members into spoke-like formation having an outer diameter greater than the pile column, and filling with concrete the spaces between said members and forming a circumferentially continuous base for the pile.

8. In the method of forming a concrete pile with an enlarged base, the steps of forming a hole in the ground for the column of the pile, placing at the bottom of the hole a plurality of preformed members, spreading said members radially beyond the diameter of the hole, and filling with concrete the spaces between said members while embedding said members in concrete and forming a circumferentially continuous base for the pile, substantially as described;

9. In the method of forming a concrete pile with an enlarged base, the steps of forming a hole in the ground for the column of the pile, placing at the bottom of the hole a cup-shaped boot, enlarging the diameter of said boot, and filling said enlarged boot with concrete.

10. In the method of forming a concrete pile with an enlarged base, the steps of forming a hole in the ground for the column of the pile, placing at the bottom of the hole a cup-shaped boot, enlarging the diameter of said boot, and filling said enlarged boot'and the hole withconcrete.

11. In the method of forming a concrete pile with an enlarged base, the steps of placing in the ground a casing having in its lower end an assembly of preformed members, partially withdrawing said casing, spreading said members apart below said casing, and filling with concrete the spaces between said members while embedding said members in concrete andA forming a circumferentially continuous base of greater diameter than said casing.

12. In the method of forming a concrete pile Awith an enlarged base, the'steps of placing in the ground a casing having in its lower end a cupshaped boot, partially withdrawing said casing, enlarging the diameter of said boot, and filling said boot with concrete to form a base of greater diameter than said casing.

13. I nY the method of forming a concrete pile with an enlargedbase, the steps of placing in the ground a casing having in its lower end a cupshaped boot, partially withdrawing said casing, enlarging the diameter of said boot, filling said boot with concrete to form a base of greater diameter than said casing, and filling said casing with concrete.

14. In the method of forming a concrete pile with an enlarged base, the steps of placing in the ground a casing having in its lower end a cupshaped boot, partially withdrawing said casing, enlarging the diameter of said boot, filling said boot with concrete to form a base of greater diameter than said casing, filling said casing with concrete, and withdrawing said casing.

15. In the method of forming a concrete pile with an enlarged base, the steps of placing in the ground a casing having in its lower end an assembly of preformed members, partially withdrawing said casing, forcing an element into said assembly to spread said members apart below said casing, embedding said members and said element in concrete to form a base for the pile, attaching to said element a shell extending upwardly within said casing, and filling said shell with concrete to form the pile column.

16. A concrete pile comprising in combination, a column and a base; said base comprising a plurality of pre-cast concrete members, a pre-cast concrete element holding said members in spacedapart relationship, said members and said element being embedded in concrete; said column comprising a lling of concrete and an upright shell attached at its lower end to said spreading element. I

17. A concrete pile comprising in combination,

`sus

a column and a base; said base comprising a plurality of pre-casteoncrete members, a pre-cast concrete element holding said members in spaced-apart relationship, said members and said elementbeing embedded in concrete; said column Comprising a filling of concrete and an upright Y shell attached atits lower` end to said spreading element; and reinforcing bars extending from crete and into said column.

.18. In the method of forming a concrete pile withan enlarged base, the steps of forming. a hole in the ground for the column of the pile, placing at the bottom of the hole a cup-shaped boot having therein an assembly of preformed members, spreading said members radially beyond the diameter of the hole and enlarging the diameter of the boot, and filling said enlarged boot with concrete.

ELIHU D.v WATT. 

